A bandwidth measuring method for a packet switching network in which a bandwidth of a packet switching network includes a plurality of nodes for packet switching connected mutually is measured, the method includes a procedure in which a plurality of test packets which at least include two test packets having different packet length are fed to the packet switching network so that in the two test packets, the test packet having a long packet length and the test packet having a short packet length are successive in this order, and a procedure in which a receiver receiving each test packet determines an immediately former bandwidth based on the difference in the reception completion timing thereof.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A bandwidth measuring method for a packet switching network in which a bandwidth of a packet switching network comprising a plurality of transit nodes for packet switching connected mutually is measured, said method comprising: a procedure in which a plurality of test packets which at least include two test packets having different packet lengths are fed to the packet switching network so that in said two test packets, the test packet having a long packet length and the test packet having a short packet length are successive in this order; a procedure in which each packet switching apparatus receiving said each test packet returns each acknowledge (ACK) packet that registers a reception completion timing thereof; and a procedure in which a packet switching device receiving said acknowledge packet determines a bandwidth of the link based on the difference in the reception completion timing that is registered in said each acknowledge confirmation packet received, wherein each packet length of said two test packets having different packet lengths satisfies the following conditional expression, provided that the bandwidth of a target link is B(i), the bandwidth of a link of the former part of said target link is B(i 1), the packet length of the test packet having a long packet length is L 1 , and the packet length of the test packet having a short packet length is L 2 , L 1 / L 2 > B ( i )/ B ( i 1).
2. A bandwidth measuring method for a packet switching network in which a bandwidth of a packet switching network comprising a plurality of transit nodes for packet switching connected mutually is measured, said method comprising: a procedure in which a plurality of test packets which at least include two test packets having different packet lengths are fed to the packet switching network so that in said two test packets, the test packet having a long packet length and the test packet having a short packet length are successive in this order; and a procedure in which a receiver receiving each test packet determines an immediately former bandwidth based on the difference in the reception completion timing thereof, wherein each packet length of said two test packets having different packets lengths satisfies the following conditional expression, provided that the bandwith of a target link is B(i), the bandwidth of a link of the former part of said target link is B(i 1), the packet length of the test packet having a long packet length is L 1 , and the packet length of the test packet having a short packet length is L 2 , L 1 / L 2 > B ( i )/ B ( i 1).
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
April 19, 2000
September 21, 2004
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